The effect of corn silk or Zea mays extract on the physicochemical changes of virgin coconut oil was studied during three
consecutive days of deep frying. There were three types of oil blend systems used: virgin coconut oil without antioxidant
as control system; virgin coconut oil with butylated hydroxytoluene (BHT) as synthetic antioxidant and virgin coconut oil
with Zea mays extract as natural antioxidant. The oil quality was assessed by measuring the colour, viscosity, peroxide,
p-anisidine, free fatty acids, totox and iodine value. The results show that Zea mays extract delayed the oil deterioration.
The Zea mays extract signifiantly (p